"Super BX" was most likely some company's rebranded marketing name for a chipset, one of the VIA or SIS chipsets IIRC, which was printed on the chipset heatsink or PCB. Pretty sure it was a PC Chips board, but could have been ZIDA, Amptron, or one of the other Hsing Tech rebrands. See:
Chipset Aliases: TX Pro, VX Pro & Co. ("Super BX" not actually mentioned)
If you could post an image/photo of the board, it might help identify it.